Module: JasperRails::Jasper::Rails

Defined in:
lib/jasper-rails.rb

Class Method Summary collapse

Class Method Details

.classpath ⇒ Object 



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# File 'lib/jasper-rails.rb', line 41

def self.classpath
  classpaths = '.'
  Dir["#{File.dirname(__FILE__)}/java/*.jar"].each do |jar|
    classpaths << File::PATH_SEPARATOR + File.expand_path(jar)
  end

  Dir["lib/*.jar"].each do |jar|
    classpaths << File::PATH_SEPARATOR + File.expand_path(jar)
  end
  classpaths
end

.parameter_value_of(param) ⇒ Object

Returns the value without conversion when it’s converted to Java Types. When isn’t a Rjb class, returns a Java String of it.



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# File 'lib/jasper-rails.rb', line 143

def self.parameter_value_of(param)
  javaString                  = Rjb::import 'java.lang.String'
  # Using Rjb::import('java.util.HashMap').new, it returns an instance of
  # Rjb::Rjb_JavaProxy, so the Rjb_JavaProxy parent is the Rjb module itself.
  if param.class.parent == Rjb
    param
  else
    javaString.new(param.to_s)
  end
end

.render_pdf(jasper_file, datasource, parameters, options) ⇒ Object 



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# File 'lib/jasper-rails.rb', line 53

def self.render_pdf(jasper_file, datasource, parameters, options)

  if ENV['RAILS_ENV'] == 'development'
    Rjb::load( classpath, ['-Djava.awt.headless=true', '-Djdbc.drivers=org.sqlite.JDBC','-Xms128M', '-Xmx256M'] ) unless Rjb::loaded?
  end
  if ENV['RAILS_ENV'] == 'production'
    # Hack for Amazon Linux
    #ENV['JAVA_HOME'] = "/usr/lib/jvm/java"
    #ENV['LD_LIBRARY_PATH'] = "/usr/lib:/usr/lib/jvm/java/jre/lib/amd64:/usr/lib/jvm/java/jre/lib/amd64/server"
    Rjb::load( classpath, ['-Djava.awt.headless=true', '-Djdbc.drivers=com.mysql.jdbc.Driver','-Xms128M', '-Xmx256M'] ) unless Rjb::loaded?
  end


  # The code below is to workaround declaring constants within methods
  # We would like to delay these till a request is received to workaround Apache Passenger issue
  locale                      = Rjb::import 'java.util.Locale'
  jRException                 = Rjb::import 'net.sf.jasperreports.engine.JRException'
  jasperCompileManager        = Rjb::import 'net.sf.jasperreports.engine.JasperCompileManager'
  jasperExportManager         = Rjb::import 'net.sf.jasperreports.engine.JasperExportManager'
  jasperFillManager           = Rjb::import 'net.sf.jasperreports.engine.JasperFillManager'
  jasperPrint                 = Rjb::import 'net.sf.jasperreports.engine.JasperPrint'
  jRXmlUtils                  = Rjb::import 'net.sf.jasperreports.engine.util.JRXmlUtils'
  jREmptyDataSource           = Rjb::import 'net.sf.jasperreports.engine.JREmptyDataSource'
  jRXPathQueryExecuterFactory = silence_warnings{Rjb::import 'net.sf.jasperreports.engine.query.JRXPathQueryExecuterFactory'}
  inputSource                 = Rjb::import 'org.xml.sax.InputSource'
  stringReader                = Rjb::import 'java.io.StringReader'
  hashMap                     = Rjb::import 'java.util.HashMap'
  byteArrayInputStream        = Rjb::import 'java.io.ByteArrayInputStream'
  javaString                  = Rjb::import 'java.lang.String'
  jFreeChart                  = Rjb::import 'org.jfree.chart.JFreeChart'
  javaSystem                  = Rjb::import 'java.lang.System'
  driverManager               = Rjb::import 'java.sql.DriverManager'
  sqlException                = Rjb::import 'java.sql.SQLException'
  if ENV['RAILS_ENV'] == 'development'
    connection                = driverManager.getConnection("jdbc:sqlite:/Users/obrientimothya/Dropbox/development/vle/db/development.sqlite3")
  end
  if ENV['RAILS_ENV'] == 'production'
    connection                = driverManager.getConnection("jdbc:mysql://#{ENV['RDS_HOSTNAME']}:#{ENV['RDS_PORT']}/#{ENV['RDS_DB_NAME']}", ENV['RDS_USERNAME'], ENV['RDS_PASSWORD'])
  end


  options ||= {}
  parameters ||= {}
  jrxml_file  = jasper_file.sub(/\.jasper$/, ".jrxml")

  begin

    # Default report params
    config = {
      :report_params=>{
        "REPORT_LOCALE"    => locale.new('en', 'US'),
        "XML_LOCALE"       => locale.new('en', 'US'),
        "XML_DATE_PATTERN" => 'yyyy-MM-dd'
      }
    }

    # Converting default report params to java HashMap
    jasper_params = hashMap.new
    config[:report_params].each do |k,v|
      jasper_params.put(k, v)
    end

    # Convert the ruby parameters' hash to a java HashMap, but keeps it as
    # default when they already represent a JRB entity.
    # Pay attention that, for now, all other parameters are converted to string!
    parameters.each do |key, value|
      jasper_params.put(javaString.new(key.to_s), parameter_value_of(value))
    end

    # Compile it, if needed
    if !File.exist?(jasper_file) || (File.exist?(jrxml_file) && File.mtime(jrxml_file) > File.mtime(jasper_file))
      jasperCompileManager.compileReportToFile(jrxml_file, jasper_file)
    end

    jasper_print = jasperFillManager.fillReport(jasper_file, jasper_params, connection)
    # Export it!
    jasperExportManager._invoke('exportReportToPdf', 'Lnet.sf.jasperreports.engine.JasperPrint;', jasper_print)
  rescue Exception=>e
    if e.respond_to? 'printStackTrace'
      ::Rails.logger.error e.message
      e.printStackTrace
    else
      ::Rails.logger.error e.message + "\n " + e.backtrace.join("\n ")
    end
    raise e
  end
end